Structural asymmetries in global food price inflation: crisis amplification, regional divergence, and the emergence of a persistent food price premium

Global food price volatility threatens food security, yet how international shocks amplify differentially across developing regions, and why food prices structurally diverge from general inflation, remain poorly understood. This study examines global food price dynamics and sub-regional transmission patterns using monthly Consumer Price Index data for 24 world regions across Africa, Asia, Europe, and the Americas (2001–2025), with particular attention to African and Asian sub-regions. Descriptive trend analysis, panel fixed-effects regression, and vector autoregression (VAR) modelling are employed. Three findings emerge. First, Africa amplifies global food price shocks by 15–52% above world averages, while Asia shows crisis-specific asymmetry, dampening the 2022 Ukraine War shock (0.45–0.75×) yet amplifying commodity-driven episodes. Second, a widening Structural Food Price Premium (SFPP), with food CPI persistently outpacing general CPI, has emerged in Eastern Africa (+28.98 index points by 2025) and South America (+30.28 points), signaling structural rather than cyclical entrenchment. Third, panel fixed-effects regressions (R2 = 0.76) identify oil price transmission, crisis dummies, and lagged inflation as dominant drivers, while VAR analysis attributes over 90% of Africa’s food inflation variance to global shocks. These results necessitate differentiated policy responses, including crisis-contingent social protection indexation, targeted food reserve strategies, and regionally calibrated international response frameworks.